<div onmousedown="WhichButton(event);">Press a mouse button over this text!</div>
<script>
function WhichButton (event) {// all browsers except IE before version 9
if ('which' in event) {
switch (event.which) {
case 1:
alert ("Left button is pressed");
break;
case 2:
alert ("Middle button is pressed");
break;
case 3:
alert ("Right button is pressed");
break;
}
}
else { // Internet Explorer before version 9
if ('button' in event) {
var buttons = "";
if (event.button & 1) {
buttons += "left";
}
if (event.button & 2) {
if (buttons == "") {
buttons += "right";
}
else {
buttons += " + right";
}
}
if (event.button & 4) {
if (buttons == "") {
buttons += "middle";
}
else {
buttons += " + middle";
}
}
alert ("The following buttons are pressed: " + buttons);
}
}
}
</script>
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